Twist stationary bike

ABSTRACT

A twist stationary bike of a fitness equipment including a pedal driven vertical shaft provided on the bike frame, a turning bar on top of the shaft, a seat pivoted to the end of the turning bar for the user to sit on and step on pedals to revolve the vertical shaft for naturally twisting waist and swinging the buttock to achieve the fitness purpose.

BACKGROUND OF THE INVENTION

(a) Field of the Invention

The present invention is related to a stationary bike, and more particularly, to one that permits the user to twist and swing waist and buttock at the same time for achieving the purpose of staying fit.

(b) Description of the Prior Art

Hustling living pace and limited outdoor activities for being subject to weather, place, people and many other factors, an ordinary 9-to-5 is very difficult to have enough exercise. Indoor fitness equipment provides a solution for the white collar to enjoy sports and exercises. Within, a stationary bike is very popular and more acceptable to the users for its proper size, and not so highly demanding physical strength such as a running machine. However, the stationary bike functions only to simulate riding a real bike. It provides limited work out purpose and gets too boring for the user to maintain regular exercise.

SUMMARY OF THE INVENTION

The primary purpose of the present invention is to provide a stationary bike that allows its user to work out on his waist and buttock at the same time while riding on it. To achieve the purpose, a vertical shaft driven by the pedal is erected on the frame of the bike; a turning bar that turns along without the vertical shaft is laterally disposed at the top of the vertical shaft; and a seat is pivoted to the tail of the turning bar. The user while stepping upon the pedals naturally twists his waist and swings his buttock at the same time to achieve the purpose of staying fit.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a preferred embodiment of the present invention.

FIG. 2 is an exploded view of the preferred embodiment of the present invention.

FIG. 3 is an exploded view showing an assembly of a vertical shaft and a second gear of the preferred embodiment of the present invention.

FIG. 4 is a schematic view showing the transmission status of a pair of pedals, the vertical shaft and a seat of the preferred embodiment of the present invention.

FIG. 5 is schematic view showing a status of the preferred embodiment of the present invention is in use.

FIG. 6 is a schematic view showing a status of the adjustment of handles of the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIGS. 1 and 2, a preferred embodiment of the present invention is essentially comprised of a frame 10, a pair of pedals provided on the frame 10, a seat 40 is provided at the rear of the frame 10 for the user to sit on and step on the pedals 20 to simulate riding a real bike for exercise purpose.

A vertical shaft 50 driven by both pedals 20 is separately disposed to the frame 10. A turning bar 60 turning along with the vertical shaft 50 is provided at the top of the vertical shaft 50, a sleeve 61 is pivoted with a bearing (not marked) to the tail of the turning bar 60, and the seat 40 is inserted from top into the sleeve 61. As illustrated in FIG. 5, the user sits on the seat 40 and step on both pedals 20 alternatively to drive the seat to revolve along with the vertical shaft 50 while the bearing helps maintain smooth revolution of the seat 40 on the sleeve 61 to twist the waist and swing the buttock of the user.

As illustrated in FIGS. 3 and 4, a fist sprocket 71 is disposed at the axis of the pedal 20 and a second sprocket 72 is disposed at where the vertical shaft 50 is inserted to the frame 10. A roller chain 73 is provided at where between the first and the second sprockets 71, 72. A first gear 74 is separately fixed to the first sprocket 71 while a second gear 75 to engage the first gear 74 is fixed to the bottom of the vertical shaft 50. A through hole 76 is provided at the center of the second gear 75 of the preferred embodiment illustrated in FIG. 3 to receive the insertion of the lower end of the vertical shaft 50. A coupling is completed at where the lower end of the vertical shaft 50 inserted into the through hole 76 by means of a key 77 and a key slot 51 for the pedals 20 to properly drive the vertical shaft 50 to revolve through the transmission by the first and the second gears 74, 75.

Now referring to FIGS. 1 and 6, a hollow lever 41 is fixed to the bottom of the seat 40, both handles 30 are respectively inserted into both ends of the lever 41 to help the user for a solid grasp and support to ensure of exercise safety and varieties of use. Two fast connectors 80 are each fixed to where the handles 30 are respectively inserted to both ends of the lever 41 for the adjustment of the length of the handles extending towards to both sides of the seat 40, and the elevation of the handles 30.

The similar structure may be applied for adjusting the height of the seat as illustrated in FIGS. 4 and 6. Wherein, the sleeve 61 is pivoted to the tail of the turning bar 60 and the seat is inserted to the top of the sleeve 61 while the fast connector 80 is fixed to where the seat 40 is inserted to the sleeve 61 for the user to adjust the height of the bike, thus to upgrade the adaptability of the present invention.

The present invention provides an improved structure for a stationary bike to allow the user to twist waist and swinging buttock while riding on it for better achieving the purpose of staying fit. Therefore, this application for a utility patent is duly filed accordingly. However, it is to be noted that the preferred embodiments disclosed in the specification and the accompanying drawings are not limiting the present invention; and that any construction, installation, or characteristics that is same or similar to that of the present invention should fall within the scope of the purposes and claims of the present invention. 

1. A twist stationary bike includes a frame, a pair of pedals, a seat, a vertical shaft, a turning bar, and a sleeve; wherein, the vertical shaft being disposed to the frame and driven by the pair of pedals; the turning bar turning along with the vertical shaft being laterally provided at the top of the vertical shaft; the sleeve being pivoted to the tail of the turning bar; the seat being inserted into the top of the sleeve; and the seat revolving together with the vertical shaft.
 2. The twist stationary bike of claim 1, wherein, two handles are respectively provided to both sides of the seat.
 3. The twist stationary bike of claim 2, wherein, a lever is fixed to the bottom of the seat, and both handles are respectively provided to both ends of the lever.
 4. The twist stationary bike of claim 3, wherein, the lever relates to a hollow lever; both handles are respectively inserted into both ends of the lever; and a fast connector is each fixed to where the handle is inserted into the end of the lever.
 5. The twist stationary bike of claim 1, wherein, the transmission between both pedals and the vertical shaft is achieved by having a first sprocket being provided to the axis of a pedal; a second sprocket being provided at where the vertical shaft is inserted into the frame; a roller chain being provided at where between the first and the second sprockets; a first gear being provided to the first sprocket; and a second gear to engage the first gear being fixed at the lower end of the vertical shaft.
 6. The twist stationary bike of claim 1, wherein, a through hole is provided at the center of the second gear to receive the insertion of the lower end of the vertical shaft; and the second gear and the vertical shaft are coupled to each other with a key and a key slot.
 7. The twist stationary bike of claim 6, wherein, a fast connector is fixed to where the seat is inserted into the sleeve.
 8. The twist stationary bike of claim 1, wherein, the sleeve is pivoted to the tail of the turning bar with a bearing. 